Home / 1,912.14-2,639.16-1,126.35

Finding the Fourth Proportional to 1,912.14, 2,639.16 and 1,126.35

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Solution

The fourth proportional to 1,912.14, 2,639.16 and 1,126.35 is: 1,554.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.14 : 2,639.16 = 1,126.35 : x
  2. Step 2: Convert to fraction form
    1,912.14/2,639.16 = 1,126.35/x
  3. Step 3: Cross multiply
    1,912.14x = 2,639.16 × 1,126.35
  4. Step 4: Simplify right side
    1,912.14x = 2,972,617.87
  5. Step 5: Solve for x
    x = 2,972,617.87/1,912.14
  6. Step 6: Final answer
    x = 1,554.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.